Discovery Science +1 Monday

An investigation into a strange discovery made by the Mars Curiosity rover, which could suggest an alien nuclear war took place there more than 300 million years ago

Investigating a UFO crash that was believed to be a Soviet satellite. Plus, a probe sent to Mars discovers evidence of frozen water on the red planet

Images of Mercury reveal spider-like formations on its surface which may be an odd geological formation or something more ominous

How did pictures from the Hubble telescope make the comet of the century look like an alien spacecraft? Has earth already been invaded by alien organisms?

Rob Nelson investigates subterranean secrets from around the world, beginning with mysterious rocks at the bottom of Lake Michigan known as Underwater Stonehenge

Rob Nelson investigates mysterious tunnels under Denver's airport, then heads to Ohio to uncover the secrets of a giant serpent-shaped mound